Indices; Basb; Overview; Structure And Principle - Huawei Airbridge BTS3612A-1900 Technical Manual

Technical Manual
Airbridge BTS3612A CDMA Base Station
The interfaces are connected with six traffic slots (BCPM slots) through the backplane,
for transmitting baseband orthogonal (IQ) data.
Backplane bus interface
The interface is used for transmitting O&M information between BCKMs.
Clock interface
The interface is connected with the BCKM via the backplane. It receives 2s, 16
%1.2288MHz clock signals and active/standby clock selection signal.
Emergency serial port
Emergency serial port is an RS-232 serial port, works as a slave node and is used for
communicating with the BCKM when other parts of the board are faulty.
Power supply interface
Led out from the power connector on the backplane, the interface is connected with
+24V power, +24V power ground and PGND.

2.5.4 Indices

Power voltage: +24V.
Power consumption <45W.
Dimensions: 460mm%233.35mm (Length%Width)

2.6 BASB

2.6.1 Overview

The baseband backplane (BASB) is used to make interconnection of high-speed data
links among the boards of baseband part, and exchanges various management and
control information of boards with high-speed backplane technology.
Specifically, the backplane:
Realizes interconnection of various signals between boards.
Supports hot plug/unplug of all boards.
Supports active/standby switchover of the BCKM.
Leads in system power supply and distributes the power to all boards.
Leads in signal monitoring lines for the fan subrack and the power subrack.
Provides protection against misplugging.

2.6.2 Structure and Principle

Functions of the slots in the BASB are as shown in Figure 2-6.
Chapter 2 Baseband Subsystem
2-13
System Principle